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Casing centralizer

a centralizer and casing technology, applied in the direction of drilling casings, drilling rods, drilling pipes, etc., can solve the problem of inacceptability for the downhole environment where they are used

Active Publication Date: 2014-04-22
BULK MOLDING COMPOUNDS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The patent describes a casing centralizer that is made from a special molding compound reinforced with minerals and glass fibers. The centralizer has a cylindrical base and multiple blades that are all in one piece. The technical effect of this design is that it creates a strong and reliable device that ensures the stability of the centralizer during use.

Problems solved by technology

Non-metallic casing centralizers for use in casing oil and gas wells are known in the art, but suffer from material deficiencies that render them unacceptable for the downhole environment where they are used.

Method used

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Embodiment Construction

[0009]In the description that follows, like parts are marked throughout the specification and drawings with the same reference numerals. The drawing figures might not be to scale and certain components can be shown in generalized or schematic form and identified by commercial designations in the interest of clarity and conciseness.

[0010]FIG. 1 is a diagram of a casing centralizer 100 in accordance with an exemplary embodiment of the present disclosure. Casing centralizer 100 includes a cylindrical base 102 that fits around the well casing that is to be centralized within a bore hole, and has five straight blades 104A through 104E (of which four are shown) that are used to centralize the well casing in the bore hole with the casing centralizer. Each blade has a curved slope 106 from the base 102 to the top of the blade as opposed to a step, in order to avoid creating any surfaces that can get caught on discontinuities in the bore hole. Each blade also includes a flat portion 108 alon...

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Abstract

A casing centralizer comprising a cylindrical base and a plurality of blades extending from the cylindrical base, wherein the plurality of blades and the cylindrical base are compression molded as a single piece from a mineral filled, glass and specialty fiber reinforced polyester molding compound.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application is a continuation application of pending U.S. patent application Ser. No. 13 / 803,088, filed Mar. 14, 2013, entitled CASING CENTRALIZER, which is hereby incorporated by reference for all purposes.TECHNICAL FIELD[0002]The present application relates to casing centralizers, and more specifically to a casing centralizer with improved material properties that is formed by compression molding a bulk molding compound.BACKGROUND OF THE INVENTION[0003]Non-metallic casing centralizers for use in casing oil and gas wells are known in the art, but suffer from material deficiencies that render them unacceptable for the downhole environment where they are used. The material properties required for such applications are not defined.SUMMARY OF THE INVENTION[0004]A casing centralizer is provided that includes a cylindrical base and a plurality of blades extending from the cylindrical base, wherein the plurality of blades and the cylindric...

Claims

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Application Information

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IPC IPC(8): E21B17/10
CPCE21B19/24E21B17/10E21B17/1078E21B17/1042
Inventor HANSEN, MITCHEL D.ELDRIDGE, ANDREW M.RIDDLE, JODY D.DANIELSON, JEFFREY SCOTT
Owner BULK MOLDING COMPOUNDS